Sea to Summit Reactor Lighweight Sleeping Bag Liner

Optimised for minimal weight and maximum warmth, the Reactor Lightweight boosts sleep system performance with advanced Thermolite Pro fabric. Infrared-absorbing ceramic pigments and hollow-core fibres trap body heat, adding up to 4°C / 7°F with minimal bulk—perfect for ultralight expeditions.

Stretch-knit construction and articulated arm openings allow full freedom of movement. Treated with HeiQ Fresh odour control, it’s quick-drying, machine washable, and helps extend your sleeping bag’s lifespan by reducing wash frequency.

Best Use:Backpacking, Cycle touring, Paddle touring

Type:Thermal Liner

Weight:9oz | 255g

Length:76in | 193cm

Packed Size:3.9 x 7.1 x 3.9in | 18 x 10 x 10 cm